66 lines
2.5 KiB
Factor
66 lines
2.5 KiB
Factor
USING: help.markup help.syntax words parser quotations strings
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system sequences ;
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IN: tools.annotations
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ARTICLE: "tools.annotations" "Word annotations"
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"The word annotation feature modifies word definitions to add debugging code. You can restore the old definition by calling " { $link reset } " on the word in question."
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{ $subsection watch }
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{ $subsection breakpoint }
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{ $subsection breakpoint-if }
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"All of the above words are implemented using a single combinator which applies a quotation to a word definition to yield a new definition:"
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{ $subsection annotate } ;
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ABOUT: "tools.annotations"
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HELP: annotate
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{ $values { "word" "a word" } { "quot" "a quotation with stack effect " { $snippet "( word def -- def )" } } }
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{ $description "Changes a word definition to the result of applying a quotation to the old definition." }
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{ $notes "This word is used to implement " { $link watch } "." } ;
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HELP: watch
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{ $values { "word" word } }
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{ $description "Annotates a word definition to print the data stack on entry and exit." } ;
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{ watch watch-vars reset } related-words
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HELP: breakpoint
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{ $values { "word" word } }
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{ $description "Annotates a word definition to enter the single stepper when executed." } ;
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HELP: breakpoint-if
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{ $values { "quot" "a quotation with stack effect" { $snippet "( -- ? )" } } { "word" word } }
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{ $description "Annotates a word definition to enter the single stepper if the quotation yields true." } ;
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HELP: annotate-methods
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{ $values
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{ "word" word } { "quot" quotation } }
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{ $description "Annotates the word -- for generic words, all its methods -- with the quotation." } ;
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HELP: entering
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{ $values
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{ "str" string } }
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{ $description "Prints a message and the inputs to the word before the word has been called." } ;
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HELP: leaving
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{ $values
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{ "str" string } }
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{ $description "Prints a message and the outputs from a word after a word has been called." } ;
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HELP: reset
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{ $values
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{ "word" word } }
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{ $description "Resets any annotations on a word." }
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{ $notes "This word will remove a " { $link watch } "." } ;
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HELP: watch-vars
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{ $values
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{ "word" word } { "vars" "a sequence of symbols" } }
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{ $description "Annotates a word definition to print the " { $snippet "vars" } " upon entering the word. This word is useful for debugging." } ;
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HELP: word-inputs
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{ $values
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{ "word" word }
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{ "seq" sequence } }
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{ $description "Makes a sequence of the inputs to a word by counting the number of inputs in the stack effect and saving that many items from the datastack." } ;
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